Maisch, M. W. Matzke, A. T. 2003 Observations on Triassic ichthyosaurs. Part XII. A new Early Triassic ichthyosaur genus from Spitzbergen Neues Jahrbuch fur Geologie und Palaontologie Abhandlungen 229 317-338 Allzero Thaisaurus Utatsusaurus Quasianosteosaurus Grippia Chaohusaurus Parvinatator Wimanius Mixosaurus Phalarodon Contectopalatus Toretocnemus Qianichthyosaurus Merriamosaurus Cymbospondylus Phantomosaurus Shastasaurus Californosaurus Mikadocephalus Besanosaurus Shonisaurus Callawayia Macgowania Hudsonelpidia Temnodontosaurus Leptonectes Eurhinosaurus Suevoleviathan Ichthyosaurus Stenopterygius Aegirosaurus Brachypterygius Platypterygius Ophthalmosaurus Caypullisaurus Osteology Maximum Parsimony Based on reanalysis of the original matrix. Maisch_et_Matzke_2003b